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Polarizing Microscopes
in alphabetical order of the maker
click images for more information
R.
Fuess, Steglitz, Berlin
Nikitin-type polarizing microscope (lacquered brass with
black enamel finish on the tube and black horseshoe base
and arm); this type of instrument was specifically designated
to accommodate a universal stage.
Focus by rack-and-pinion mechanism. Circular rotating
stage (diameter 9.6 cm) with 360-degree scale and vernier.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube and the focusable
Bertrand lens into the upper part. Height 38.5 cm. This
instrument misses the polarizer.
Signed "R. Fuess | Steglitz – Berlin | N°
2027", first half 20th century? |
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Ernst
Leitz, Wetzlar
Polarizing microscope (lacquered brass) with black enameled
iron limb and horseshoe base. Focus by rack and pinion.
Circular rotating stage (diameter 10 cm) with 360-degree
scale. Polarizer (Nicol prism) with swing out condenser
lens. The analyzer (Nicol prism) is fitted on a sliding
shoe into the lower part of the body tube and the Bertrand
lens into the upper part. Height 32 cm.
Signed on the body tube "Ernst Leitz | Wetzlar |
113993" (1909). |
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Ernst
Leitz, Wetzlar
Polarizing microscope (lacquered brass) with black enameled brass limb and horseshoe base, in fitted mahogany case with accessories and key.
Main focus by rack and pinion and fine focusing knob (1/100 mm) on the limb. Circular rotating stage with 360-degree scale. Polarizer (Nicol prism) with adjustable diaphragm and swing out condenser lens. The analyzer (Nicol prism) is fitted on a sliding shoe into the lower part of the body tube and the focusable Bertrand lens with adjustable diaphragm into the upper part. 3 objectives in interchangeable centering collars. 5 oculars numbered 1-4 and one unnumbered. 3 compensator plates; , Glimmer 1/4 λ, Gips Rot I Ord and Quarzkeil 1-4 Ord. Height 31 cm. Signed on the body tube "Ernst Leitz | Wetzlar", and serial number "163333", made around 1915, delivered by D.B Kagenaar S , Instrumentenfabriek Begijnekade 19 Utrecht.
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Ernst
Leitz, Wetzlar
Polarizing microscope (nickel plated brass) with black enameled iron limb and horseshoe base, in fitted oak case with name ( J.V.D. BORDEN) and with accessories and key.
Circular rotating stage with 360-degree scale. Polarizer (Nicol prism) with adjustable diaphragm and condenser lens. The analyzer (Nicol prism) is fitted on a sliding shoe into the lower part of the body tube and the focusable Bertrand lens with adjustable diaphragm into the upper part. 3 objectives in interchangeable centering collars and 1 Reichert objective . 4 oculars numbered 1-4 and 2 compensator plates; , Glimmer 1/4 λ, Quarts I-3 and 2 compensator wedges Glimmer 1/4 λ, Gips Rot I . Height 31 cm. Signed on the body tube serial number "231926", made around 1925. |
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Ernst
Leitz, Wetzlar
Polarizing microscope (lacquered brass) with black enameled
iron limb and horseshoe base, in fitted mahogany case
with accessories.
Main focus by rack and pinion and fine focusing knob on
the limb. Circular rotating stage with 360-degree scale.
Polarizer (Nicol prism) with swing out condenser lens.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube. Objectives in interchangeable
centering collars. Height 31 cm.
Signed on the body tube "Ernst Leitz | Wetzlar",
and serial number "238821", made 1925, delivered
1926. A label on the cover of the box reads "A. GALLENKAMP
& Co. LTD. | 19 & 21 | SUN STREET | FINSBURY |
LONDON, E.C. " |
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Ernst
Leitz, Wetzlar
Polarizing microscope (lacquered brass) with nickel and black enameled brass limb and tube and iron cast horseshoe base, in fitted mahogany case with accessories and key.
Main focus by rack and pinion and fine focusing knob on the limb. Circular rotating stage (14 cm diameter) with 360-degree scale and vernier. Polarizer with adjustable diaphragm and swing out condenser lens. Analyzer fitted on a sliding shoe into the lower part of the body tube. Signed on the body tube "Ernst Leitz | Wetzlar", and serial number "359331" ; made in 1941. On the upper part of the limb stamped Ernst Leitz Wetzlar logo and letters “DRP”. Inventory number 35999 (written with white paint on the base) Made in 1941.
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Nachet
et Fils, Paris
Polarizing microscope (lacquered brass) in fitted mahogany
case with accessories. The unconventional design was introduced
c. 1880 by the Parisian microscope manufacturer and collector
Jean-Alfred Nachet (Alfred) as a response to “those
microscopes that require the centration of the objective
by means of two buttons…”. Harry Rosenbusch’s
design did indeed require the centration of the objective
to the axis of stage rotation. Nachet eliminated this
necessity by coupling the objective and the stage.
Ernest Mallard described the present stand in 1884 as
belonging to ‘Nachet’s old model’. It
is one of the very first examples of its kind, made between
1878 and 1881. The signature on the base reads: “NACHET
ET FILS | 17, rue St. Séverin | Paris”. Height:
39 cm. |
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Nachet, Paris
Polarizing microscope (lacquered brass) in fitted mahogany case with oculars and objectives. Main focus by rack and pinion and fine focus by thumbwheel. Circular rotating stage with 360-degree scale and x-y table. The hinged analyzer (Nicol prism) swings into a slot in the body tube.
The mechanical coupling of objective and stage eliminates the necessity for optical centering.
Height 41 cm
Signed on the backpiece: "Nachet à Paris" and marked: "G.P." "53"
Ca. 1910
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C.
Reichert, Wien
Polarizing microscope (lacquered brass) with black enameled
iron horseshoe base in mahogany case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Polarizer (Nicol prism) with swing out condenser lens.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube. Interchangeable
objectives. Height 36 cm.
Signed on the backpiece "C. REICHERT WIEN",
and serial number "40250", made winter 1909-1910. |
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C.
Reichert, Wien
Polarizing microscope (lacquered brass) with black enameled
iron horseshoe base in mahogany case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Polarizer (Nicol prism) with swing out condenser lens.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube. Interchangeable objectives. 2 compensator plates; Quarter Wave Plate Glimmer ( muscovite) 1/4 λ, Gips I-order. Height 36 cm.
Signed on the backpiece "C. REICHERT WIEN", and serial number "66881", made 1922. |
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Seibert,
Wetzlar
Polarizing microscope (lacquered brass) with horseshoe
base (black enameled iron) in mahogany case with accessories.
Rough adjustment through a sliding tube and a rear column
fine focus. Nicol prism with condenser lens. The analyzer
may be mounted on top of the ocular. Height 34 cm.
Signed on the tube "SEIBERT", box numbered "7441",
ca. 1895. |
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Seibert,
Wetzlar
Polarizing microscope (lacquered brass) with horseshoe
base. Rough adjustment through a sliding tube and a rear
column fine focus. Circular rotating stage (diameter:
9.5 cm). Nicol prism with condenser lens. The analyzer
(Nicol prism) is fitted on a sliding shoe into the lower
part of the body tube; adjustable Bertrand lens into the
upper part. Height 35 cm.
Signed on the tube "SEIBERT". Dated: 1900. |
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J.
Swift & Son, London
Polarizing microscope (lacquered brass) with black lacquered brass limb and base in fitted mahogany case with accessories. Main focus by rack and pinion and fine focus by thumbwheel micrometer on the limb. Circular rotating stage with 360-degree scale. 2 objectives and 3 oculars, a flat and concave mirror, Abbe illuminator with extra lenses and two condensers with Nicol prims polarizer. The analyzer (Nicol prism) is fitted on a sliding shoe into the lower part of the body tube. Bertrand lens in the body tube. Slits for compensator plates; mica, gypsum, quartz.
Double nosepiece. Height max. 40 cm.
Signed on the base "J. SWIFT & SON LONDON", with serial number "11667" on the bottom of the base. ca. 1903-1904. |
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J.
Swift & Son, London
Polarizing microscope (lacquered brass) with black lacquered
brass limb and black enameled iron horseshoe base in fitted
mahogany case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Swing out polarizer (Nicol prism). The analyzer (Nicol
prism) is fitted on a sliding shoe into the lower part
of the body tube. Double nosepiece. Height 36 cm.
Signed on the backpiece "J. SWIFT & SON | LONDON",
and serial number "17067" that also figures
on the cover of the case, early 20th century. |
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J.
Swift & Son, London
Polarizing microscope (lacquered brass) with black lacquered
brass limb and body tube and black enameled iron horseshoe
base in fitted mahogany case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Swing out polarizer (Nicol prism) and condenser lens.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube. Double nosepiece.
Height 35 cm.
Signed on the limb "J. SWIFT & SON | LONDON",
and serial number "17726", early 20th century.
The instrument was originally made to be used on the Geological
Survey of Great Britain. |
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J.
Swift & Son, London
Polarizing microscope (lacquered brass) with black lacquered
brass limb and black enameled iron base in fitted mahogany
case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Swing out polarizer (Nicol prism). The analyzer (Nicol
prism) is fitted on a sliding shoe into the lower part
of the body tube. Height 32 cm.
Signed on the base "J. SWIFT & SON | LONDON",
with serial number "12413" on the bottom of
the base. The cover of the case is signed "UNIVERSITY
| OF | LONDON". ca. 1906-1907. |
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Voigt
and Hochgesang, Göttingen
Polarizing microscope (lacquered brass) with a distinctive
triangular cross section arm. Focus by rack and pinion.
Circular rotating stage (diameter 8.6 cm) with 360-degree
scale and vernier. Polarizer (Nicol prism) with condenser
lens. The rotating analyzer is mounted on the upper part
of the body tube. Height 30 cm.
Signed on the body tube "Voigt & Hochgesang |
Göttingen | N° 580". Dated: 1878. |
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Voigt
and Hochgesang, Göttingen
Polarizing microscope (lacquered brass) with a distinctive
triangular cross section arm. Main focus by rack and pinion
and fine focus by thumbwheel micrometer. Circular rotating
stage (diameter 8.9 cm) with 360-degree scale and vernier.
Polarizer (Nicol prism) with condenser lens. The rotating
analyzer is mounted on the upper part of the body tube.
Height 36 cm.
Signed on the base "Voigt & Hochgesang | Göttingen".
Dated: 1880. |
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Watson Bros. 4 Pall Mall, London
Polarizing microscope (lacquered brass) with original accessories in fitted
mahogany case. The main frame is of the common "Lister limb" design which has been adapted
for petrological use. There is a graduated rotating polarizer carried on a
swing out carrier. The standard ocular for no-polarized work is replaced by
a rotating analyzer also with a graduated scale. Quartz and ¼ wave plates
are mounted in brass and fit the slot in the main tube. Also supplied with a
small lens to fit over the condenser and a disc of calc-spar to fit over the
analyzers for stauroscopic use. Signed on foot "Watson Bros. 4 Pall Mall, London, 5159", ca. 1885
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W.
Watson & Sons, London
Polarizing microscope (lacquered brass) with black lacquered
body tube, black enameled iron limb and horseshoe base,
in fitted mahogany case with accessories.
Main focus by rack and pinion and fine focusing knob on
the limb. Circular rotating stage with 360-degree scale.
Swing out polarizer (Nicol prism). The analyzer (Nicol
prism) is fitted on a sliding shoe into the lower part
of the body tube. Height 32 cm.
Signed on the body tube "W. Watson & Sons, Ltd
| London", and serial number "40247", ca.
1928. |
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Carl
Zeiss, Jena
Polarizing microscope (lacquered brass) with horseshoe
base (black enameled iron). Main focus by rack and pinion
and fine focus by thumbwheel micrometer. Circular rotating
stage (diameter 10 cm) with 360-degree scale. Polarizer
(Nicol prism) and swing out condenser lens, under the
stage. Height: 32 cm.
Signed on the tube "Carl Zeiss | Iena | N° 6929".
Dated: 1884. |
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